{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x3f44fbdf165af2d92c6691f7f5ded6431e7e8415c6818ea18cd8030774f8a7d5",
    "signature": "0x742a8dda10b1ce585ac35d46454cef6cfbbdce95e89d39959e0f9f1cab71d9d83042dd75c35d17143aad87cfffc109894bdd7f02a8f389049a3142775add962f1c",
    "signer": "0x832F4BD24a7ba2CF0fA874d501e05F9b0DC4dF17",
    "userId": "760361796"
  }
}