{
  "manageEntity": {
    "action": "Update",
    "entityId": "551154161",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x77cebee87619006711621f5e57b3fc595a12c486ee5c42fdde91c3410672c9e5",
    "signature": "0x0507a1b6ab125590496c55fb65fa540dcb3402368994b4a7fcce94c97f7d926e345948eefffaa0320f8f9243aab226c0b07e934cd3c5969156899aa11842801e1b",
    "signer": "0xfA2000d0d05DaEBDc5cc71819681272c07A88A52",
    "userId": "551154161"
  }
}