{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1880605",
    "entityType": "User",
    "nonce": "0x1e3fb91b23fd44c7f4ce7da8f7f1b4171282414a8b871d9aef9f52be3a94e609",
    "signature": "0xb04d43c4536914edfdb7f491f95b35a98f9fbd5590d217c226bdc1c74bec3f4e5b409b0a7a1bd63a430d7339a5aecf9b1fc36453f5aa8004c20d780e13af1d461b",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}