{
  "manageEntity": {
    "action": "Save",
    "entityId": "1994398239",
    "entityType": "Track",
    "nonce": "0xb439dface0bf35a99fa6de188f4cbef0cc8cc2319dbb57df29fa57fd132818a6",
    "signature": "0x9dba0414c621465ac2e2e89ce84872b6a31575e6d57b7b40345f44bb5af8513a6dd908f0612fbf1fb74c9bd9ab5d2e47b061c8e6ed814577846e4df2c37b2aa01c",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}