{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "977049898",
    "entityType": "User",
    "nonce": "0x3ffc6738c5fb9dcbd7a75774f4a98fc185d8f48fd59c8b2f7c02c6a37718c693",
    "signature": "0xa74c6338b720959a22fb28de21ef8f7c6e3c5cccb17da59247ff75243d3f7d1408e456465fbb5291f27c3e3c7138afe8b3e5047e3d4d038037b1153de802f5311b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}