{
  "manageEntity": {
    "action": "Save",
    "entityId": "187078266",
    "entityType": "Track",
    "nonce": "0xd1ca5326f2f14d9ebe3a49c009050182376deaccc7402643cc6191876a7afbb2",
    "signature": "0xf5efd6f458e4d998e78027ce47969fc643b715da2fe196aa789897ef90dbfd852b7b186448a8891284681cbd4082d1c753642681adacf5128b3d5e56336ef5e01c",
    "signer": "0x7425EdbFdF528603A88c658f4cf8B1396a8a77F5",
    "userId": "406225571"
  }
}