{
  "manageEntity": {
    "action": "Save",
    "entityId": "1138909989",
    "entityType": "Track",
    "nonce": "0xb074eed12ef31c5f4de3f9b9f93b2dcefa64ff9cdf4d17b1e8a0d1100fce7c67",
    "signature": "0xbe146f1665bf387b4361b7aa04ea51ed888dfdf8aba20d75394df266f6b59db264b242d01d5674b11c04146f169a9c4bd907204bb734bad61cdffabfa5cb2ebd1c",
    "signer": "0xC922b0f44F7050c6A066BB1c2dF2243426C9A136",
    "userId": "94317"
  }
}