{
  "manageEntity": {
    "action": "Save",
    "entityId": "2031391315",
    "entityType": "Track",
    "nonce": "0xa92863fd86d7bd7345bf20fa28af376e154506ddeaa2fec60613c24de3febc57",
    "signature": "0x54c08f4dd19c0468695223745232ccd5d0304bcb44ae7263c52e25f9f9cb45d17ca76b634b3cffdead67a360a22888066760a3e195f3216f70891de8cfb712631b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}