{
  "manageEntity": {
    "action": "Save",
    "entityId": "1294924552",
    "entityType": "Track",
    "nonce": "0xbafe40a1b2eb4db13c609b2d571d4fc8b51e3d944df8e14f0735db2e9cf74a88",
    "signature": "0x45369f30c2a14ecf4b8bbe62875887b170aa8b63be84c5e7ab8ab1def83243b04e1f448760603cb74295db32f4c35739dff158a21818ab1811e3eec06667596e1c",
    "signer": "0x102a924C1c076Dcb5816d20E32Dcb6F00e75F2C9",
    "userId": "485987672"
  }
}