{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x261e8179466613d2413e923d7078f44705edff74fddd255630c8cfc04ab1346a",
    "signature": "0xfc9c83f36ae9d1c2da1a5e2afe3c498d91fc94482270fb1e98a3bdca03baa2ae2ccea142b8bc5c334f7ce1337e830192da830bbc72475d133a679da76dd34bb91b",
    "signer": "0x61e6A1F6D330893BaeF12f4A5520567D90456B41",
    "userId": "766461388"
  }
}