{
  "manageEntity": {
    "action": "Save",
    "entityId": "1414587731",
    "entityType": "Track",
    "nonce": "0x90599961ef6ea9b29e88c1a4ccdcabeb3e4e9a10c8fe4a0ab6a8f60b534f9593",
    "signature": "0x9bc97555c53bbb5f8c6f7b7ad9bb816fda301da969ff217a4df6e8409060a9f63967c078845c02d16c6b69b5eb7da046a2fd890d4cb4b362d5f37786f3625c721c",
    "signer": "0x195d9eE11400245E841C02c4b4288a90A8195e91",
    "userId": "103785872"
  }
}