{
  "manageEntity": {
    "action": "Save",
    "entityId": "1293091053",
    "entityType": "Track",
    "nonce": "0x0b2a014df821b039d35ebc66a7f7fdaf40f18d52363f05e993c70078ddc95940",
    "signature": "0x32881f69728e0d8b99d9e386d915f9b6e1effe52cf3df403a3b84a9fc3369d9a23e26e6f0a8cfa5db10da3d36b4c922ed5ac170ccc17afc4e4165143ad3e9ad11b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}