{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x6beb1dfc3b0cfee1edf0037a7a6e0ad7ca46079276e981caeac37758c01ca2c1",
    "signature": "0x547dc5f4831ae8a6205b3a5edb7008b27e0c77dd6e300f5667cfd3cafcb34634409db9ff427d3ed3f7ae5e14beb530b81642bce2d2a0bf51231e55744a42237d1c",
    "signer": "0x03bc996D8aa54c356C312A9E8a34d7f1168C957a",
    "userId": "45865194"
  }
}