{
  "manageEntity": {
    "action": "Save",
    "entityId": "1468123115",
    "entityType": "Track",
    "nonce": "0xc3d2afeb2627c6c0a8471cd3d7245be07894901f9283ef0be28d01dfaa14c840",
    "signature": "0xf21534fbff1ae01ced2c3ef007c9f9ce0d9f134487abb2d6d28c8a1f12d7306f0ff1686e5e02afc5d20286c4f4f5629dbd3f2e7c53ffb01f87587f88ea395cb41b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}