{
  "manageEntity": {
    "action": "Save",
    "entityId": "1216684482",
    "entityType": "Track",
    "nonce": "0xd1a9babd522c9d477e02547200ead71cb4f905105c6527db2483df4f77f04e14",
    "signature": "0x487c73105d00e7b4d708065258f63cda59c2fabfea2d0067ef341d0a3e98a0e90d62b21a796ceceece30d8c617704925cfd040f5c75a22fbb7cff106d1782f121c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}