{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "870684573",
    "entityType": "User",
    "nonce": "0xb2c054c97ebdfa7af75aed997d92c827b7928dbcfa48b6d2ddd3398e63450a8f",
    "signature": "0x5a3d7c4219944d57a5a4106196359617b168fbffdc552744fc590423e6a0c46c13301d44f2d9401d94b39da3540e54d2b37eeae9fd6c6ee1a31bbdd4554f47201b",
    "signer": "0xa899e54a1aE2f8D645E14e3E1EBF6398971ece5A",
    "userId": "906687997"
  }
}