{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xd39446f4f9c78c43a4665acbdf81a006a445831096d6949b75b1f9f06d2623e0",
    "signature": "0x6df8748694b9be2198bc7d0f481c9a7ab069992ead5c6d599748b0e19bea743a0149c89014409b4e65aa1dbe4cb10291785a25395392c84e7df7bafddddf0f621c",
    "signer": "0x6ABeC6bBE57CCcb5414C4f1DF7397331b9828727",
    "userId": "750637079"
  }
}