{
  "manageEntity": {
    "action": "Save",
    "entityId": "2089991432",
    "entityType": "Track",
    "nonce": "0x81e5e82c6bf48cb711741c8227c172d97d0a037e6e2194bc49b13272761b76ca",
    "signature": "0x66476a114676080e194b60e0efd4bf7539f6d4b92dcb81cfa4b548f67fb63f111ded0c7bb599ab3a06d80b633a3ebcd85db9bb7c5d079d20e9e2225dc7d989301b",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}