{
  "manageEntity": {
    "action": "Save",
    "entityId": "1086918",
    "entityType": "Track",
    "nonce": "0x2d4944f76887abff92b6ef9fa5d8f5fa6b8194c06d9f11ac2f5e729c5884286f",
    "signature": "0x57050d44b716f36669d0e002657831d0cadf867712ddeed241e1b13e694c585d5bede207ddeafa1f16ecfd47a118ad656dc6b976edc2302600cf1a759be02a7c1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}