{
  "manageEntity": {
    "action": "Save",
    "entityId": "1429585929",
    "entityType": "Track",
    "nonce": "0xf412e067db39644595d56066004ba5340a96dbfed75eb1ebfc26887e97e6f340",
    "signature": "0xfc5a8808855296265844cc0acb22b95d7951a4c89f598fd928f28de25a93feb0313de1ccb89b70c90fd52d40ab4dabb81194ec4cc6743ee37ac1d2aab1ffb1b81b",
    "signer": "0x90CBf7c9BBF688fd9Fa4029B96e1BC32b270cA24",
    "userId": "711459379"
  }
}