{
  "manageEntity": {
    "action": "Save",
    "entityId": "352384",
    "entityType": "Track",
    "nonce": "0x4bdca642498f88e82b21c3ea0b9209054819a47c0d4a25d042c101263e97a2fe",
    "signature": "0xe0fa22c19495f20c3d33c2b44b7e4415d4d587d8acd1ab8ddf8b4af4325e22e760146a06f3f5c07b42c8209c486a93cdff372d5df4eaf829631eff41155cb7d41c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}