{
  "manageEntity": {
    "action": "Save",
    "entityId": "572188",
    "entityType": "Track",
    "nonce": "0xa015bd689a41d07d97bc30e93559f141535bbc9714e3ada801f7765c332bdb75",
    "signature": "0xe86e3646eeb83279aff2b8bc3da66412256cbb7ff42262012e081d60107d90a17530f1656739e63840c89f870a398b8162ace2e98f97f822cc7a07f19677d1ad1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}