{
  "manageEntity": {
    "action": "Save",
    "entityId": "598932741",
    "entityType": "Track",
    "nonce": "0x9a05d02ede98097310347088c0209693a5758e4fde8eae84b321386cf143e5c9",
    "signature": "0x6a22bdda090f6ab57c4208df10921e3c616d484eee232946e175e5d59764be44619fe597cd91148c661aaf7625b32d1af2ff95216610e80c5a231ce69fd841c01c",
    "signer": "0xC08bE28cf05cBcaE3094E0FbAbfA61ca8Ad61dc1",
    "userId": "190259218"
  }
}