{
  "manageEntity": {
    "action": "Save",
    "entityId": "1249004944",
    "entityType": "Track",
    "nonce": "0xa57aa78ab52f458d9e678855eee898cec848b6dcceae908d5df5adfede007793",
    "signature": "0x9b91a658ede4631b505883bc17e1196a6f4507ebffd64dc449dfe4abf37f8dec3ce4c814c21db352c96131d275f7936509f7d21d38311b326d64446b26e621eb1c",
    "signer": "0x742Fff9be20F80Ce7285c8Ab12B9018Ef3Cf14F0",
    "userId": "111467392"
  }
}