{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "672",
    "entityType": "User",
    "nonce": "0xd5b89f3f4134798799665f81b3da9a0a4a741a828b9dd2069e1f28b074339207",
    "signature": "0x98cf39aa879ea1b82890ac3eeae595df9d1cd568f1723ca616d90b9e3ed112d95013a3d8bd0830ae3f95ec1a3e738d9ea780d8d4ec99eb96a71e005f98da04121c",
    "signer": "0xa899e54a1aE2f8D645E14e3E1EBF6398971ece5A",
    "userId": "906687997"
  }
}