{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xca27ba759d948e4206fc76923036f88ce947b5fe6c7067bce3a54a9de5e87db8",
    "signature": "0x52ef88bf4f3bf848fa11f40cb94763b80ec1d8ac0d606dbc3afa605ee817756c1ac51e99274e8443614452bc21e717cbc7af4fbd11155aa873923b204919299f1b",
    "signer": "0x3Ab8fF95DbFC0deFd15d4d27949f03d9fDd90404",
    "userId": "136466"
  }
}