{
  "manageEntity": {
    "action": "Save",
    "entityId": "1175687921",
    "entityType": "Track",
    "nonce": "0x6afb743c0b51ae62f162178d120a45f051b397ff15577f5b7fcd35e436705d8d",
    "signature": "0x4e0a1e18bb7bec743bba70628af771d3e5eac97668adda7090e952269bc40b2c3fd822669239c5af2d1d20b6bfe9afd5830df469addd9c6fda2ceef73408e6a91b",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}