{
  "manageEntity": {
    "action": "Save",
    "entityId": "1174784509",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x347fdc21c964ce922892e1a4eb2e8ce8303b044ca735cbb313bb3c72c8c91243",
    "signature": "0x3e63d68db7313ea2fa4a2c0f143b47cbddec65572811909ae8469b5bb9b794d5016faae4e40f77f26e5b7c1486b05d7517e2d1b2617fa198413fe8536886c6781b",
    "signer": "0x0b901AE3Eb7b439095858D82Ff194CfeD0Fd3396",
    "userId": "167557"
  }
}