{
  "manageEntity": {
    "action": "Save",
    "entityId": "956742",
    "entityType": "Track",
    "nonce": "0xeefc68f4e9102805d536075fed3be904ab90fcfb8142fadfca864befa1562640",
    "signature": "0x29b07666bfe58addbcbce4f7089ccda5642355ecf3f9132cd8c02f24ef74222c06e1da62c8847bc53263595b9b9a17124358e83f652abe8ee986688978a8f1fe1b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}