{
  "manageEntity": {
    "action": "Save",
    "entityId": "1229947555",
    "entityType": "Track",
    "nonce": "0xaca7e73bdd63e9bb4a82395b670c0c39d097c8f7a66d5981138e0055f4e46462",
    "signature": "0x8ea1fd70062f8325942186c3bdf9dd8c9060b2b895c2461049dea2df9ef4b65c3039c9d6e0403a81b1d6cf414e0d72f44fcc46d49e2e979b5aba0e00dc24c3b91c",
    "signer": "0xF7F56DF4D8a2Ae2BF9Ca645DC684f84c37BbDaFe",
    "userId": "116272245"
  }
}