{
  "manageEntity": {
    "action": "Save",
    "entityId": "1490055706",
    "entityType": "Track",
    "nonce": "0x5dd857d8c6448034e84e9c213bc3b75f973f5d3d3bd31219c7e5e4c0fb71ab16",
    "signature": "0xe8fb6380bb8f6d35ea187644a436df9b4cd464532d65b0f05e8c8de08615291738ea11633c0a1f3b7c58812084b9c65eb565889307eb6b4dd8431e97431c40971c",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}