{
  "manageEntity": {
    "action": "Save",
    "entityId": "431613030",
    "entityType": "Track",
    "nonce": "0xfa47911455845cec09ff36d2460ed7a0e2fe883d825a7b7ac7f213be1c6ef3a7",
    "signature": "0x8c40684f655bf9595fd9ef4eb74ae84d638bb8c7d089b73db727c296b234e46e6cc8945fd9c246609f1d47d1899d500fc92f2e5779a98d323bb2e1a7c3064b5d1b",
    "signer": "0x7425EdbFdF528603A88c658f4cf8B1396a8a77F5",
    "userId": "406225571"
  }
}