{
  "manageEntity": {
    "action": "Save",
    "entityId": "1608668393",
    "entityType": "Track",
    "nonce": "0x5584136d9c8e4f120d1e139936dc27a36ba476d682ea048cba030f3a40951859",
    "signature": "0x61f47822285c8e3f596b39985d21adcb7c17df48c67ae5205f64da3b1bc832f13b402f14fdbe5eeaf41e7902c05bc2144dd4c4eb51e2ee22573a383d1603a9d51c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}