{
  "manageEntity": {
    "action": "Save",
    "entityId": "655124",
    "entityType": "Track",
    "nonce": "0x53127200ce90401dcf4243b5af669eb6c69805dca24447422681f3a117301d91",
    "signature": "0x79689bc7929bfbe2b1dba4f51d631d44a77c2774769408988e738ac578c4bef91cce65b3fd183cdf3ff10fb67a9c3b8c8c6d1182767cbb04126e7e7e830923cf1b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}