{
  "manageEntity": {
    "action": "Save",
    "entityId": "2187960",
    "entityType": "Track",
    "nonce": "0x09856ce6c3ea0fd7e08a6b41024a3cf46cb5900cfab06ec9d55beb19cb5103af",
    "signature": "0x39111cb941aaf876d7049956b75e80df46a500a4d3b350814af43ad09668048c1abe400ec58999a5003ff68c53bbe0126e267e61805bb78d425ea2b40ac3bce61c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}