{
  "manageEntity": {
    "action": "Save",
    "entityId": "325256080",
    "entityType": "Track",
    "nonce": "0x96ada1947ee82eafe902dd54c0c77ff563ce1f92a964dbfbd6661df4377ca6ad",
    "signature": "0xb8977ac3c74d78a67e01cc49eca282e84758c8bdfb4c5ece3246eba6c119b2b73e7bd4d7299868a6df29363ea49082c2cee68416753f47e282e556d80c76a1141b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}