{
  "manageEntity": {
    "action": "Save",
    "entityId": "1131271",
    "entityType": "Track",
    "nonce": "0x73bdb643896db4247e2d6f7040326bb107368cdf63d0ff7df75bcb3a6a2c3f1f",
    "signature": "0xa72c90e092e536a68a5ee8cecdb819d9c494fc6fd461669c3a8100609c081f971c152da514321ef375ea497d03074fa6ba4eece54b4b9b1f461c4d0873db0e2f1b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}