{
  "manageEntity": {
    "action": "Save",
    "entityId": "2146568463",
    "entityType": "Track",
    "nonce": "0x169cebc8b9e76fbe3001d396ab0f51ecc4ba506493e69c09ffc7b7c0f30abd59",
    "signature": "0x4acb8164fff72791f7d39e6901ad4cb1e8a7c2ec3c8a893cf9664f92cc63eca3529298836a80001443f615ebce3e37b159cde23fbd9ec12159866c4ac50b987d1c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}