{
  "manageEntity": {
    "action": "Save",
    "entityId": "1552833584",
    "entityType": "Track",
    "nonce": "0xf5bdf88e92b973afdbcee9474ed612326d0e1c50ea3b233e61c060ead599b301",
    "signature": "0x01bac6410a47b5744c4027229d8d03886d74088a981451fa917cc478c57b82491ffb0b1e9b6c8f5d09add63e626f105542399ffb2531412c25b39e25a117d6531b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}