{
  "manageEntity": {
    "action": "Save",
    "entityId": "913379483",
    "entityType": "Track",
    "nonce": "0xfea3c46650ab86b322dd0db1f14ba8a5e65fab75a67b115d63da0f88be8ecf61",
    "signature": "0x66bfb6facffcdf349bb1ec6478cfc06b83fdb3c298b4d564ef3c8ddb88ace52c51ed9d75c1abde5ce0fd403d6d360c9828654633940afa650dbbe9bf5a25155a1b",
    "signer": "0xAf1f176E32866fb97d822F6f5222061aF11ef652",
    "userId": "954117045"
  }
}