{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x5a26bc244aeb89910daefe11db58747f7f9863ca47fa60abb9661cc435581229",
    "signature": "0x3c4756df4f76153c87810e32619c34c6e452863ce3fc57525c9619c1908727ae7b6484aa98b9b9bbab451f56f50578cf986025522d6c4a212c34846679bac9bd1b",
    "signer": "0xED833c6b1BB3B2051ACbfEaEe3272092f0f4689F",
    "userId": "291301280"
  }
}