{
  "manageEntity": {
    "action": "Save",
    "entityId": "1466385045",
    "entityType": "Track",
    "nonce": "0x62e7a91aa64ea302e84de1c6a7d8f3aac6bd46dfdf870e418c2dfbb66a826e91",
    "signature": "0x42daf0827ad523c60caa2d41dfa04fc86d5dd03919491dc1ddd4a2511519382c0e7a2d6bf89da5cd3a4a9c4e0024c4634be1f55e26ba9c87d6fae0d7c8d115ab1b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}