{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xb3e408115656ee3cf05b72668fc337a989a60964c71037b9e08d671947e16309",
    "signature": "0x3a05d19966504d27b35cfcaa3a6b0f89ebe375b4e5f2c7ef2a73914e0ce7580872a691b0e380cddfeb672e053b213bd0da4be8eb90ece1fa0b516c8e4dea8da01b",
    "signer": "0xb8aA4e7B0108528a09b04945Fa761C98BC0D6111",
    "userId": "350255884"
  }
}