{
  "manageEntity": {
    "action": "Save",
    "entityId": "1024873",
    "entityType": "Track",
    "nonce": "0x7eb8478a2c53c39b04a19ab7580235802c07f155ac0a06321e0f1451c71520ed",
    "signature": "0x0a6216083dfeab5ba92a28cc138c693bf1afab3aeb367efcb00c7388a78fa57d49420e9e1cdca83de69ebe4e277cff5a4ed920ff0583ae77af091d3f545d32731c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}