{
  "manageEntity": {
    "action": "Save",
    "entityId": "1619802161",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x64b74afcba7ef8538e66e70346a03c81f0ef7052a860d74be4b3c6f542e852e0",
    "signature": "0x68bfbd6801f291347555f381a7cb093754d096efb7a2198cd70eab9ff11f1d8910f670b17d0da86e2e7279f9f1f30d771a7651a7332232425e84e636ed5767ba1c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}