{
  "manageEntity": {
    "action": "Save",
    "entityId": "1491883920",
    "entityType": "Track",
    "nonce": "1792320938558853804",
    "signature": "0xf1144fe1798a3ddee03313cd8ff084c2d5e3345ae892d924075168e7b003ddac2f4bab5d9f1a3911c39dba3749e2f40a43f0df58dbbec2d1342da89fa45fb3921b",
    "signer": "0x23dF8876fD80368D375d911e3CbDFd15B8e85CB5",
    "userId": "827420993"
  }
}