{
  "manageEntity": {
    "action": "Save",
    "entityId": "1802612042",
    "entityType": "Track",
    "nonce": "0xc33c4eb61499198b377448274c65ffc75f9226adf1e02fd275b3e51632e58301",
    "signature": "0xeee0538c917e2abe2895cfd0bac19f2af26f8a289985069b2036fe2dc07596c4522e1cbb8e15767156c4ce42d6f6dc66f081b290453101ef05968d2688bb97f21b",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}