{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x765589e6d2e056e44487f0cb043e04241b076f00915e0e98f36bea2f75d9076a",
    "signature": "0x84b99344ddf0e17bb0ced0110bc62a2ffb0832cc57e42bf955d7d0660778f86e38e15246eedc46b9fd96cefabf9e03a2bad93467b9ea6febd22ccace2ce2e8381c",
    "signer": "0xe87C31b64532cB37AF1e437F9764994164E9d583",
    "userId": "701183610"
  }
}