{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x735485b06ba838f5b96cc514b912f737a5b5261f7d4931becba7927b10986527",
    "signature": "0xdc3164488a6a6b0ea8c2ec7ef76d9a02ca4dfd7dd68cf71a5b1f7385c33d62560359c106619141fb4157f627322a23449ba9ad615e207136881032ef99888c041b",
    "signer": "0x69163Aed5B32EC7f6C8a1e4aDEd7fD7E298F9521",
    "userId": "508931608"
  }
}