{
  "manageEntity": {
    "action": "Save",
    "entityId": "539763680",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xb70dfc76268affc6030edf3b0ac718fdf4ab18caa8a18934a90dc7b421dd8e56",
    "signature": "0x9d3abeed622b4da33b8e7f3cc084ddb5bfda21fe341848d84ea3f4afa93e64154ebee3016e91055e888822c360bb54e865e88b07acf6cbafd6f0323e20823b3f1c",
    "signer": "0xD9254B079e0e1571E56512C57188F2eec899054f",
    "userId": "854498636"
  }
}