{
  "manageEntity": {
    "action": "Save",
    "entityId": "2097484972",
    "entityType": "Track",
    "nonce": "0xa5b87db2b356ae49510c098038a52b5f6a2b55d39e3600207d2e7d9beaadd7fb",
    "signature": "0x74402ca7e320f7fcb18566054077c271c30b6e1d3c4c9ea15f39df2d2313f5fb37100f186ed55505e7653127a95ebbf3fe09fc09683a9a740c5f49c3a72146251b",
    "signer": "0x92d3aEA782A42D4B044a13a4727af9Aca3a0211F",
    "userId": "12615893"
  }
}