{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xca498007ac39208a908e8a4b99a8a1595d9011beb803bc03e3f15f0a7ee0ca2a",
    "signature": "0x5da2ea4be52bcfa1b8c0614c06f70aa39a76cecd7d69875cfab4ba216a9bff77060baf1c446405a8ac12ad2bddb239eed831c2f26c39415a447598ddaf4788761b",
    "signer": "0x832DBc0F688D4b18292044b87259Be398F06481a",
    "userId": "879827965"
  }
}