{
  "manageEntity": {
    "action": "Save",
    "entityId": "214905950",
    "entityType": "Track",
    "nonce": "0x42bb6e776f7d6146b135e47511f20f510f8ed73448640806b13988556025fbd0",
    "signature": "0xb332caa1c88538f83d9103c7b39adba3f4bbe93cef043a79655882e1329ae0da24809bdb4d59b15ebd0eeac39699fd369c56ccfbc5d1823ead21e99c0a75b15b1b",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}