{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x807592c151219d30ac70d796320195e7b6cac265a039e596b49adfc22f22bce4",
    "signature": "0x4a118c267b01f6e65272a0247e90458b34a9510f0d8a9ccea7a4a03d62c74161530e72e3bf4377d23b6c834506d1e061c33c651f9f77cd3acada914aa2f3a0071c",
    "signer": "0xb9ae2aD406d36a9257891ee20A0D3B2d0F8b414f",
    "userId": "637335360"
  }
}