{
  "manageEntity": {
    "action": "Save",
    "entityId": "1333827870",
    "entityType": "Track",
    "nonce": "0xf90ab86335a306c2d664be50c4eb6e839889e4f1780491062982ee4651750419",
    "signature": "0x32023bdd48e8c15fba54187af3057c38f2aeb0c8fafb1914b7d3ce6633470d4f4ed681bc2db996a6b7024fd7045cd0a4be168f8b73948407d72f3c9c8b114d801b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}