{
  "manageEntity": {
    "action": "Save",
    "entityId": "480032",
    "entityType": "Track",
    "nonce": "0x58eddb78b03265c7d178f4be50b7ea52f13a018142de7113539881f3ec4c1aed",
    "signature": "0xe81b3c4b8cf6c8b70f32e94a929f8dc7eac4156844e39463de40b58e80e17d5c0c2ab5f4d7c4f13c5ba82f2da9a66f946a048f28c29ffe4641ea0c6fafc9e07e1b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}