{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xe0e158dfaf5f49e95d8b44c06ed1cb95301cc8e906fd4dac5477f2e3aca1af09",
    "signature": "0xe47a05ff7931cf5608af69eacdaa215006ecb6f5d62a6d7bd2e7cb2ff567ed2d714dac72dd8bee6232f3d084a4b6bc819e8ccfe64035909019124cd2ccfb27fd1c",
    "signer": "0x995Ca8f2d3956487967aCfd7EA849313C448c3a8",
    "userId": "227564"
  }
}