{
  "manageEntity": {
    "action": "Save",
    "entityId": "1806967155",
    "entityType": "Track",
    "nonce": "0x2f69421463a5868ac1c1656c6ce087cfa02a2fd7485c24f15c8f25405f76a108",
    "signature": "0x7daadacbff6e61f456638efb8590223541a0ad3f116ff58ba4238181dffbd7402be004e23c1a58168863ac984bcf0e4facc36133ca04fbb28719a14fe2924cd81c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}