{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "508263176",
    "entityType": "User",
    "nonce": "0x11bd60e233706ac6bb71ab5825b38ac92693e2fe52b2284e9db46d85d95f583d",
    "signature": "0xf1a61e63c84aafc7d23f708a018aab121c21a73f28169519765ee6e673a3a5e534d3be3b37990dc6a35f25d10c351916472a0784c7736400b4f53c7cc0f790231b",
    "signer": "0x866CB73184a8420C302e3850B610761F882C4DDE",
    "userId": "166428182"
  }
}