{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xd141657a21ff43acf28fcd1b74e8ad69ce52e08d41993e1e9f702c8c2c033286",
    "signature": "0x67d989a6064512260b8c50352ec91f8774679f7e8f14853166ecc0b1418ff782460fd6701a8044d7e1037f297cdb874a3b9aee4fcbcf17de6885389b8554447e1b",
    "signer": "0x059FDD826bF0763b4bC967b47369bfA626eA4253",
    "userId": "238749470"
  }
}