{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x4ddba9db16ca9b362d5a51b89722f0a3f195ab6ef6aeea03e612bc1152c83e2f",
    "signature": "0xd27c0582869b108e976ea1c39cb1686be109000f9ed743523cc98adefde49a9100da366c30e495fb9d40f6d3d55c3ba351ac24fb3154dddd61d14e31cfd2e14a1c",
    "signer": "0xF9362B2E61556107FEfba9e0E9E697e627514519",
    "userId": "834423721"
  }
}