{
  "manageEntity": {
    "action": "Save",
    "entityId": "48666533",
    "entityType": "Track",
    "nonce": "0x53bb5d189201a199a19905ad6076b7d2ae1ff3e49deee674b1b48c0aaed2fb24",
    "signature": "0x0ab9164051d13f13f3447a15ff9d8caf1fb3192f1b0aa1a13c5505504f1de90b7bf24ed40c3f737ef0d383b43912cded857a9c6a731526a3007099d01184a6b01b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}