{
  "manageEntity": {
    "action": "Save",
    "entityId": "1591173384",
    "entityType": "Track",
    "nonce": "0xa9d590f963d503798557fd40b66980495105f2ede475040f2f8e7357ca1341d7",
    "signature": "0xb66d7e85bb2e374bf76a60c81d75cc3caba5e46d45dfe1c846c29fa283b0ea120b757cb1dcdd721d2ee6a02596369ebc9a679f706ee01609a66fd0f341c238f61c",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}