{
  "manageEntity": {
    "action": "Save",
    "entityId": "1872366663",
    "entityType": "Track",
    "nonce": "0x6e6a6621bbc501663b29c1dddac3c5ed0c92c20b367f176e90ccafc60ac55e76",
    "signature": "0x29135817ab63979d5554879f4624d44f6544a581b544b937127957ecb60c6f9330c54993fbdaaaa255b40439cf6e163d8a411f2061828638b147f9df8a87f4b91c",
    "signer": "0xEeea4f65FD2D7EffBC68176EAbe8544B088Aed57",
    "userId": "584616263"
  }
}