{
  "manageEntity": {
    "action": "Save",
    "entityId": "218597",
    "entityType": "Track",
    "nonce": "0x5eb04e2918b56ba10b60548aff65eeee03589fec21a8c852c0522d691de8626c",
    "signature": "0x5e6dabaac099ac6ecd7eba4f07168efad67da8fc21fd0c23bbc8711d8ff8c4457e0958b5384fb49e782cb5ff763bac5957bc3006e42f3afff973a25b2c0b62a21b",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}