{
  "manageEntity": {
    "action": "Save",
    "entityId": "931500870",
    "entityType": "Track",
    "nonce": "0xe944b142b2d76c121525f688403f0aeabeb114dba1c94f6b347671aab2667237",
    "signature": "0x7676b3289800f59d77489e020c8a48d57bd2badd44b9315aed6237ed3570ea3817006f9f36d706826aa54f64911a6a2f6385626b9ada60f3c853de554c08da2b1b",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}