{
  "manageEntity": {
    "action": "Save",
    "entityId": "322073390",
    "entityType": "Track",
    "nonce": "1790791604066076499",
    "signature": "0xbb581fb06b277b62e1ed6e66d560845c8679e070978ad49e9709ca617fe7e0115ec3a0aa2f628885dee246cc7b11c330ea0a7c5bd1989e4ee451fe91612c5f281b",
    "signer": "0x6620103988B969bE5810F1B5530c1A44Fe6048A1",
    "userId": "568518925"
  }
}