{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x1db2edef8f6f60bf99bdbe1fe4e476aa8f96b34e82c6cb19f45edb5b64a0eff8",
    "signature": "0x08eeb3cb90828bc676385e847f0fe68eccc8e4f8a7db4f95580a4b7a4f8ef22a1e08ae2bea480bdd67b46e6de44275f5dd3d084a8646f5723be13a68869ff43d1c",
    "signer": "0x663FBcbEEC703DA94AA8DD65612bbBE2119F09c4",
    "userId": "605457275"
  }
}