{
  "manageEntity": {
    "action": "Save",
    "entityId": "376094264",
    "entityType": "Track",
    "nonce": "0x260ba3da2d68a6a509f6e48a37feaff3328b5225f4fd86c1866f3dffae00a0df",
    "signature": "0xea57215fe96b67ac3808124eaa9f7007ba60e7897aedd0285dc85b12dbe980662159e78c3d1737bf8a42d432176435c609b4b95cca1bfae43822c1f6f76bade11c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}