{
  "manageEntity": {
    "action": "Save",
    "entityId": "1278719493",
    "entityType": "Track",
    "nonce": "0x28e109cb4f29e5cf939ec327e0b0300f71dea9d51cdc8a866423c573c19cc3c4",
    "signature": "0x110d9b6ed9d555bba07f4644d2ce1235cdaebcc3a1220540fc1e56b6cd6e0ec235912f37c6d9030237071d23269f5092e76acf57cbc07a9c2131009a41ce14ef1c",
    "signer": "0x5b1BC6b15bFD49D3991AD6E84621e7f0FBF2a77e",
    "userId": "548409021"
  }
}