{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x6f43d1df73dc506cec737f6e07b78f18c25f3e781cc7f7b171b62a0feacb15ad",
    "signature": "0x7454a3da91786e3e2607320a8efb3861e4dc895bf121224651dd1ad33a189f564dcb9eb52362e1ee827bf10b0e660a47c01fa9ee5c648495494c24d82ab026d81c",
    "signer": "0x2Af2AEeE011CF6bCc6c93622Ac4577ae4b2Bb2aF",
    "userId": "856700503"
  }
}