{
  "manageEntity": {
    "action": "Save",
    "entityId": "1146399804",
    "entityType": "Track",
    "nonce": "0x0e769b1163a8e2c07dc09d416d7ce9602c7ebec954bfe62a7804dc014d9e8050",
    "signature": "0x576a9dd5fcfe310392b8bad5806602053f4aa9b95434f85cd2e80317ad57bd7f671789ee6380224e849ff89aa98f0a0c02c936fcd2f051d90ec992623b1dc6081c",
    "signer": "0x793bbEFbb3Cf1e6529B90296e502145aCcCDE8d6",
    "userId": "838777725"
  }
}