{
  "manageEntity": {
    "action": "Save",
    "entityId": "542654",
    "entityType": "Track",
    "nonce": "0xedd392d80d3a30a833219db6adcd084f47393328cccde89f0bd8dd031931f9b5",
    "signature": "0xc9c4c5584ba0d0e75dbfb5efdbaa05c9b3fd88ca6a8805037baee665bfcc64b1197be98c58bd093c28c3f0bd869389988ac4e987f94d5a7cd295e609a021dd431b",
    "signer": "0x55B320FE4ae0dC96fE927A1d4fA23b18d1874EF1",
    "userId": "562822143"
  }
}