{
  "manageEntity": {
    "action": "Save",
    "entityId": "226531",
    "entityType": "Track",
    "nonce": "0x29c6e9fb0119a053c9dc9e7b6667f565dfd276c36dbb916f8d86f5218b94db77",
    "signature": "0xbf8d4b708e923f2a6c27069c2acde7dd7a6355ca91248971a53ee4647710bcd6768cf3f07949e7e66a465df5e9aa2a1736c67a3cca71c17434ad44ffeba50d7c1b",
    "signer": "0x14FF2Ce3bf23AEeC9C140996251F6f85D8e99431",
    "userId": "53273933"
  }
}