{
  "manageEntity": {
    "action": "Save",
    "entityId": "2045802591",
    "entityType": "Track",
    "nonce": "0x0ae74696d179c7245198bc54c95d5494a1ba33b6dbf878bc3d4e6f1cb0598aeb",
    "signature": "0xc223170b79c4c306c6dd4d2170fd0e2e4b9f12c9045302870da92578b3de110f0265731957cd925e9cc15442d093067ae06e7aaaa1f0912cfa66d90d5c204def1c",
    "signer": "0xbbB98413eB671bb0000F0b18A2A7Cae9631043E1",
    "userId": "98311147"
  }
}