{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "573071921",
    "entityType": "User",
    "nonce": "0xf5f3786a82649974a3b1584bdba3dc17d1fba64e7f06d274b7919b5db9cca89b",
    "signature": "0x249e66392b1dd3a175ca24481fe635eec3f3410f3ece6f8ed670e0d9b794b2ff3878df689b0de3f63a207dff42ea4bf21165b49f808be7bc51af08b9cef589601b",
    "signer": "0xEcA3Cb1451A243c74832B7B02fdb9Bd1029BEfeC",
    "userId": "449714482"
  }
}