{
  "manageEntity": {
    "action": "Save",
    "entityId": "1240877981",
    "entityType": "Track",
    "nonce": "0xc928c9039b8f6cc2ba15ba1a83b01f1a11433ff69acab8420cecd43573384993",
    "signature": "0x3a36eba5f1bfda2826ceb30e16648603d1867fc05fa9ff43deca84b38e2105d67947ea7cd6ad2a9ec3beafcf2e37325c196d6e46c1cd749160c45ef0672646461b",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}