{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x40002e8a1303794bc615461bf3464533c6ce0779c0e8c74e7cde839b7110317b",
    "signature": "0x3c25ba37fe29459643ddd1ad20aaff0b22943ce81c51e2cac7bc26acd7ea2ed027e5446dd05e77e9a765dcd2acc8f46eacbfe6e512a7abefbb125a8c62d14ece1b",
    "signer": "0x69D7699156fe9a786da8cc3ee979eaa512E6BA81",
    "userId": "6137592"
  }
}