{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x7f2e6d7d9475b03e6e19584cc2bc7fb3a58f7ebe2c074b13c03141ad39e982a1",
    "signature": "0xa66fabfae8c48af27ff6e86343df586a98678e399eb72a51eff16a687124f9966c1b47d655b1acb09ef230848e7e37fe1228414540dbba50941dda7270dbf90a1b",
    "signer": "0x68FcF23730770DbCd0Bf6cBE87649Bf95320aFDe",
    "userId": "106648682"
  }
}