{
  "manageEntity": {
    "action": "Save",
    "entityId": "988800",
    "entityType": "Track",
    "nonce": "0x71a950883a40cfcd855f5ebb62a6d126693760731c44865ead8dced55b31537d",
    "signature": "0x3c9428604685d623f5ac07acc5b11791cc017763e9c448b68d45171227aa4e921e2a10ae335015d24fb7fa7a66156d6c679863e4b12993a84367cb0b80f7fd2d1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}