{
  "manageEntity": {
    "action": "Save",
    "entityId": "1916429870",
    "entityType": "Track",
    "nonce": "0x7de9f9bf8afe5e1792b9d192ac6019ab604b85aa9aa0c6cf1d80364c0af6ad18",
    "signature": "0x93d321c31a78762a1ebb729cd6e46349b82c0e3e5e82359e6a7b00736920a5c04f50bebe9b16558dfbcaa2e74151df66f6c2718ca6179488ee9c0d071f4781b71b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}