{
  "manageEntity": {
    "action": "Save",
    "entityId": "1508942347",
    "entityType": "Track",
    "nonce": "0x2b53e9b1cb0c7dc686fc01ffb8295e25065dc91ecefdca3c5177f28e0a4f24c8",
    "signature": "0xf1bd637cc508ce98cda056828bfabf37040a9c59bad062f2c2537ae07203f66f2fa1cf508dd380cdfdd7333f53bfd1ee31cdbdb8b7582aeb07a40b60c8a208b21c",
    "signer": "0xC35123bF05ca0B3A7B333c53E47bcd9f9DA864d4",
    "userId": "33896318"
  }
}