{
  "manageEntity": {
    "action": "Save",
    "entityId": "2121059782",
    "entityType": "Track",
    "nonce": "0xf771d6b8540f39dbc20d1c3be8c4e977dd97c5dbeb8bedc53c9548647263ca06",
    "signature": "0x43de8282f12c46c34d4f020c311d0ffb2cf8e81f0e3623e12b5fe179b0009a6e51ae917bd4b1594e92c6af9a1bec79b028b731cc04e3b7d830aa5e2faaa681b51b",
    "signer": "0x796D60E9fE921C82Ef20f6329e27dD246392f542",
    "userId": "809803"
  }
}