{
  "manageEntity": {
    "action": "Save",
    "entityId": "863958300",
    "entityType": "Track",
    "nonce": "0xf794ac9a8546c26ef9f0d4f4629cd1a7e1a03f84fc1b1d8bc6b632a1a2636d8b",
    "signature": "0x76fcfb000373872c0269989bf08ef4fb4582cc1146916eb659f03891b3bc23717498fe16471d9a2d6a196f636b684475c45fc30e78cfd853f8ab496b2d1a54b01c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}