{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "638004",
    "entityType": "User",
    "nonce": "0x38d4ea1372fbc5aba7b0d02d3294eebd89ed4fc00f9e60cd8ca27311f6735946",
    "signature": "0xfa95356e99998b8099ddc96eb4d36f24def4b24ee629e4b87b6a013e85f8de64275b0cf3b5ac82e277b6ccffffe34ba38181b8e1424777c7c961fab6085b982a1c",
    "signer": "0x6eF66a6206A4589bEd5849d15Bc2746C2603b01f",
    "userId": "989336341"
  }
}