{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xcecfd27be3b78930d403721d7198b7275c3285ac499f9575582f44e53c99b6da",
    "signature": "0x75ce46d556d765214a7c8399ede8a7358897733c636e92e68177cd0c9ab8750f368830c501e1370873492e8134a6128a998736e656cfd28574d95a1162d4ecbe1b",
    "signer": "0x545B64d85e0d9fe383d66fCF99e8f5A404B1EED4",
    "userId": "271095155"
  }
}