{
  "manageEntity": {
    "action": "Save",
    "entityId": "569372731",
    "entityType": "Track",
    "nonce": "0x755a49ecbc0cbdb93ae55a88e44a9b23ddcbf5b7af339ef3f8b67e8d1b23e98c",
    "signature": "0x0fec3a9400ca4c0b0e908453652b922c66d70b890af72f7b72e9f5100b7287b83d2929092b1a4e137f0de4f99e5577c548295e74f6d43f67fe030772addd14761c",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}