{
  "manageEntity": {
    "action": "Save",
    "entityId": "748115437",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x56ab70caa2b4b0d783621b046a93703a02bea5eeee8deab563d6ddb98978ce06",
    "signature": "0x0ae004a5ff367d12d301b0c35a0f9d398f24f093e25d3881b0342993f7424102262b7136f70ffec16180f9b2cf49b6154fc00042b22368acfc1c3706fac611841b",
    "signer": "0x14b153a5103f70fAc7b1eeF8c4636200C182a1ee",
    "userId": "62654"
  }
}