{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x7da9f483d351c6f179ae9efc1383d50d8d3c5a169db47bd287af0ccb7208f00f",
    "signature": "0x2d137fc3ee7ad365da373112598a252f667aba1b952e32bab6cf626d41e33bc95fdbb217dc43b72f1505edbd265a39c669294b32983e0eccdb4e085bc179dacd1b",
    "signer": "0x8D14071Cd3fF310822709162701CEE2bB0dF6569",
    "userId": "88412221"
  }
}