{
  "manageEntity": {
    "action": "Save",
    "entityId": "131371725",
    "entityType": "Track",
    "nonce": "0x97c341ad0c462c7546540ad5c49b0ba1eb8818982008611732e18c0009bf73dc",
    "signature": "0x1a5e0d0c21e5e0c62165ae72d098a89f95310a9f18524a9e90bf247b65cff5481f4ddb583749792984b0a66dec2305c74fbc456bdfa5bd139755ae0be95274781b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}