{
  "manageEntity": {
    "action": "Save",
    "entityId": "1721750026",
    "entityType": "Track",
    "nonce": "0x0e5e49e2c99e1ee0fe20d926c03bde51e1952ea7e83aed4dc246feb90c380273",
    "signature": "0xab9b0de53f2cbc3e70b52cc468bc5ca4965b94ab3ff795dbc67af4df5e45f3867cd6168a10af5466fa4db08c3ad66652ef8162a480cd5b56ddcd555bc9d31bd71b",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}