{
  "manageEntity": {
    "action": "Save",
    "entityId": "1848005119",
    "entityType": "Track",
    "nonce": "0x19766c0fa70e38d8ddb3ed2344341b5424ef72382dc2c9dd291253eee41a1647",
    "signature": "0x40cbbf0d42e197dbb6a73faffd6729a2835b346419b469df489fed0923cf9e755692066dd8029717f1cddc64fbd2307217e6c50917f691bc1a038904f71d13531c",
    "signer": "0x4Aa8154A33F33394BA8De574d71aC98Ba6A47D5a",
    "userId": "645720561"
  }
}