{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "75469",
    "entityType": "User",
    "nonce": "0x9f19bc3c24f754fb1a23ac6c81813dcdbd43023bcf8f8f64276167a389bcdeae",
    "signature": "0x3b84c10392a521293cf68937b1f05f6239e3d3f74cae2de276bd8afd85ca4d56071854fe6b699543f441bdf119092b89e24db3b6ccc2fce1a8c5bfd462a375d81b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}