{
  "manageEntity": {
    "action": "Save",
    "entityId": "125936038",
    "entityType": "Track",
    "nonce": "0x79ce63b15a4b7eed13af7e1bbf5c19aa4fb1cfe1cf3f71428cc5581b641c6f04",
    "signature": "0x64731fdfa812f40269b89a1d2698b82abd965bbf56b490edaebfffab8e85850d3011800e398fad5db1887ed8109d800e528ebfa1e7ef3c26e363fef4518dedf41b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}