{
  "manageEntity": {
    "action": "Save",
    "entityId": "802231820",
    "entityType": "Track",
    "nonce": "0xfb59fbf8b8e583e6904a4f848d47b687c045662fa646cef1c82b77645fa7d906",
    "signature": "0xb7a6c29d1be1fd4f7cbfa83ba16c034f9015be524c0d43ad7ef2ea3a3018aa14651d364a7e7d0798af6d81c2f6fa18f725dd09794938b0b2783769b9c413bc3a1b",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}