{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x256f51d535f90c731578cfe5c4dfd05cbe965281bd7612150180872db8a22fb3",
    "signature": "0x99acd130dd6d3cd619fe9901cfd4a9bee4459cf63952338f0519b83096b737103b2f83982a60edc805b8e5ae284569a64911feebb1955586d55c4aae00ac7bf01c",
    "signer": "0x7BeE6A029868871221bFC265e0DAE4553A4eC744",
    "userId": "229698256"
  }
}