{
  "manageEntity": {
    "action": "Save",
    "entityId": "376948992",
    "entityType": "Track",
    "nonce": "0xa73f2acaba7e4cc89dd4dd8fe93fbed63c52aa769ae0633cf8158def0f013b6d",
    "signature": "0x32cbb9dc94b104e068a369eb051f53d684c4a93198ebea96f5170b9e375a2a1f1a34c079a79ff3fe3c2d9de8b105388f85d86bebed9a931933ce53615621c9901c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}