{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x051166139f3ea7fc1751d9eec1170d94fc07b1ba308388fa4575401cbf9c96b5",
    "signature": "0xd666f66e32769492c7cceaf10485e1ff7eb7fcd123b371f9c3ade77d5271f00b3616a3e3f4b4dddbf19f9ebb582cb866908b1fd514c1694bf93d3f7e5f21a4011b",
    "signer": "0x90c0041acE11aDfC1bb0cd6567b59c5804861264",
    "userId": "97532602"
  }
}