{
  "manageEntity": {
    "action": "Save",
    "entityId": "72693",
    "entityType": "Track",
    "nonce": "0x043c10133094d82b6eda38dda242c95c9b159e6017b021d54f4ae20bb848427f",
    "signature": "0x8d23c67d2f5d1c17afe4449e738bf99bf56dce73260b77220df003029aed5e5b3cfbfaa3f55d5f24528e5c7abb9d02825b52c0d04dfc2012772ca370c4ffd7ef1b",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}