{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "450156790",
    "entityType": "User",
    "nonce": "0x929b3108b56a217e5cb173083d87ec57e1e01f712716a91d0c60d58734ff0f5c",
    "signature": "0x5c6c4236679df6cd82436b8554af9b90dc1b9ad34025b2f2bbddc02b65b943ae6af5180f359d5fd3d111f5fc3dbd373acfe7c9150deeb514fc433c31e643a8171b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}