{
  "manageEntity": {
    "action": "Save",
    "entityId": "1038862",
    "entityType": "Track",
    "nonce": "0x8d20d1efb101bdece721312963de787990c91dbe26c767e43b1c5b4044173c0e",
    "signature": "0x109bd4bf90df39e97dfce840052f1b0fa79666012abe69a41aea0df5a704596118b43348fa16b3220b8e28b2c8dc97a449b6502e92c3ad61b95ec940bbd557851b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}