{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x6aa487b463b58d087e3c4d432b6ece1c6be90d9e52c21aa7414bcb91b1d78ded",
    "signature": "0x693cc68cae8c25d49873aa3389ce0b1aeac7541e9c2675b0a732dd72468e8a0e79b14a00d5c52fc74a20fe95bf1aff527647f479f46ddabf9c9a9376f018532e1b",
    "signer": "0x972fB2aC0F87455abaD19aC25234dff9A3227235",
    "userId": "937331705"
  }
}