{
  "manageEntity": {
    "action": "Save",
    "entityId": "2116679177",
    "entityType": "Track",
    "nonce": "0xf6d12035af9469be4551866d0f500e91a878b469774b86d81d548a6b8fb35cf6",
    "signature": "0xed6d34b2c3429d484de31a59f5eddfc454e5d913bb4759a39326f26bf4d061ae1709388ae94d4b1cdb1e751f7f6a6278cea7e9a4bfc1c5e428ba62b0fe8cb2831b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}