{
  "manageEntity": {
    "action": "Save",
    "entityId": "559865764",
    "entityType": "Track",
    "nonce": "0x5341a10d716df71ff2cf85dcd5cccb26df66b405e60a3db40828a96594a7b706",
    "signature": "0xe3c8cb5a6a680f935325cf84dfb1ffeff8f5798f2270acf7b58db4929063640a059910f8e7c43c56cabdd29aa3ea1905450673bd4a1d8a0f7945e65d43306ff31c",
    "signer": "0x793bbEFbb3Cf1e6529B90296e502145aCcCDE8d6",
    "userId": "838777725"
  }
}