{
  "manageEntity": {
    "action": "Save",
    "entityId": "1114802932",
    "entityType": "Track",
    "nonce": "0x9ce5111f3d76c7bb79b74ded9e36c0861ad8e00ab889a222111eadc5b52e6443",
    "signature": "0x8cb1e1e390977ee7255909f989ac14105b1109359bbfddb70df5531cb9fe86066615840beeea61d9c8546184069ac48ce9df9f6cca88191deca9bb968381e5141b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}