{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1873428",
    "entityType": "User",
    "nonce": "0xc6f0d19bff2e419aee526405a2d57f8bd460996e3baf37f120a3a5297c50223f",
    "signature": "0x5fdab5fd31d419e2afe6d2a3fafb7d4f490d54e54ecb2676ad0a876c1317c36106468d96b161d9d32f7cb17d2346a508c2e0ab9a2a7c3443729e2db63597dd881b",
    "signer": "0x90d627796C9E2071AAd9F8C20f6dCE95587F6d13",
    "userId": "560619378"
  }
}