{
  "manageEntity": {
    "action": "Save",
    "entityId": "1121291050",
    "entityType": "Track",
    "nonce": "0xacf4145cdb6fb682b256c14e71710cd7621c99207432430092cee63dbe065078",
    "signature": "0xa166281017c9bd8e0d40382571ce62e79ac611e1a774ef4799255f5bb361729d1bc1abfad15ba693e7745dc706163be4323fa8fee3fdd8f7ec61a980b7af01e91c",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}