{
  "manageEntity": {
    "action": "Save",
    "entityId": "1031833",
    "entityType": "Track",
    "nonce": "0xb8e0aab851aaae9d85e8f77a46c5e6314d6b26d20d1339be33d66dac6cea45b0",
    "signature": "0x1bdc70a80a30b1b1e1cc386c64e626fd1c27429a30395e5d0ee183ce17f917d51432a5b3b605be76e459cdcb17bd18cd7be5fe9029b87698a93910912e15c5ff1b",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}