{
  "manageEntity": {
    "action": "Save",
    "entityId": "28298021",
    "entityType": "Track",
    "nonce": "0xbe2fa8783476f26f2eb4c7f819ff8d18bab58f710e27cb8ee4488b21768d0647",
    "signature": "0x5326e4426fc175b543acbf3f8ccb1e5f4aa2a7069e16240eb5576307aa73c0b82e2caa0cf249800a8afb49543ee90d12647e42fc4b547f7fe9c6187d947783d51b",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}