{
  "manageEntity": {
    "action": "Save",
    "entityId": "536988672",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x3872ca6f6f608078adf7203e7cb9560e8551172aa085f5c65d3320f55654d0f6",
    "signature": "0x8cdfa2654672357a9cd46f28d17becdbdb1431867fd01072a360748c4e4f89b06b9ff4e7bc721037d13cbd8cb48f605cf1b67cf576de4c335a638287210c46aa1b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}