{
  "manageEntity": {
    "action": "Save",
    "entityId": "2100085204",
    "entityType": "Track",
    "nonce": "0x91598672d411db54c9388830a17223a86179359bc0c31a8d766a011d2214f144",
    "signature": "0xb6fbf9d21b5774107b245963afc98b7af34d8fdeae402608c50535294ba3496e5ca19496772c44b22901cce75bd515bc2b07dfc0bd1836964d87a02fe4b3a5781b",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}