{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xbe4baafa68d2cb9b10ba771ab6be493ff085a79505ef4f19ff2626d18cfe6829",
    "signature": "0x1bff3d4293b5434549c33058eed7ac2df7caba721ad31f3ebd45bcdbaec584976344d1acd0e56e42d5bf3f639c6bd3448deff6b1bc23bfd256fb37821a4457561c",
    "signer": "0x81a222e31eE5da12e83086Ef876b3fdEA361f8De",
    "userId": "122649957"
  }
}