{
  "manageEntity": {
    "action": "Save",
    "entityId": "439597393",
    "entityType": "Track",
    "nonce": "0xbc1f1a3699d40576d57dc24de0f91fc9f9355f9e8d29c2c6320f993e6508a5a6",
    "signature": "0xaea8be98857948837035faf9ef7fae13aff91f07f6bdea0619b9e3990a4d63321711dbf8d42665c1dd9b0183337ff7f56a3fb5396e3ecb3bdb6a4b4d0325e67d1b",
    "signer": "0x4E3828bc809fb5B9deb81fa536cF73Dd5bF4eeB2",
    "userId": "185184169"
  }
}