{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "6673",
    "entityType": "User",
    "nonce": "0x9139dd00fad1dd39795a0d4095030359b26754731302b01655678bba87d51aa2",
    "signature": "0x3f4488cdcf94f82ab905dfab7ab8249182e395bf9ceaccb23563ceecfb1eabde73c7575208e245bbc4ada6a445c96f583f3381f44fd04bd117738a9f572870181c",
    "signer": "0x569a23a5D506E4404139fB7510738Ee5b80F5624",
    "userId": "280440301"
  }
}