{
  "manageEntity": {
    "action": "Save",
    "entityId": "1105167899",
    "entityType": "Track",
    "nonce": "1785588817406431915",
    "signature": "0xe9256528b8e63c76e3067522e11ed9b14c907f56afb2616cfa1272b5e2b655df6bcc4909d88c93284cce34b51193683edfdd1a9ca2f314b727e7e0d202ebac501c",
    "signer": "0x6620103988B969bE5810F1B5530c1A44Fe6048A1",
    "userId": "568518925"
  }
}