{
  "manageEntity": {
    "action": "Save",
    "entityId": "1284127143",
    "entityType": "Track",
    "nonce": "0x857f25157f80cdbfe49820cbe79536a5635ab3d7d0708e8bef076724ec71be2c",
    "signature": "0x3b61f1ca4abe39d2833a42fd4b2ae222b65cb353e67cde701b84a96e1a20c62e7eca660d4a6937abae20dc3b27663106881bd93c6fd2c6d84511ef67d0ebe22b1b",
    "signer": "0xF7628Ea36C0C266E289b7538b033fB949A6C31ff",
    "userId": "386745392"
  }
}