{
  "manageEntity": {
    "action": "Save",
    "entityId": "1431031856",
    "entityType": "Track",
    "nonce": "0x2c8b2aca4f190967cec149a9841db605aba166a74a9a4971dab568917ee596c7",
    "signature": "0xf41665f88512c9aacfceff495175cf807586383480a3a96ad349e0cb251fbd4316c41bdf302c8aff7e94bb1f4270607f7347a7d11a2ab275e343d669e218d2291b",
    "signer": "0x4Aa8154A33F33394BA8De574d71aC98Ba6A47D5a",
    "userId": "645720561"
  }
}