{
  "manageEntity": {
    "action": "Save",
    "entityId": "2072610449",
    "entityType": "Track",
    "nonce": "0x764121da88a8ecf3d847e139c4d22f28006e79de35f01bcceee19cdc9266c729",
    "signature": "0xe84b3699daca5acbde06186bf53a5027e86f41e27a3d3fbd7b8a5159b23415893a60be0be669c10b0e31b96a415b447d11a821ab307cf6a980b8c7095fff69b01c",
    "signer": "0xF7628Ea36C0C266E289b7538b033fB949A6C31ff",
    "userId": "386745392"
  }
}