{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "580720856",
    "entityType": "User",
    "nonce": "0x3f26a7143db33da00c39e90d504c5d5809c73f2157faee69fb7d3a47a97e4af3",
    "signature": "0x93428f17fc98f4f286de9bc5e80104aa908551312266cb95e7dc1ccaea0a1e061e3dd1dd5d7fda4a3a54955e2ed562cbeb10cf997a48d431da1d96c3e5f015831b",
    "signer": "0x5D040c7e172B07431383B4bd6Fdd84ed67B8Ba0f",
    "userId": "508547804"
  }
}