{
  "manageEntity": {
    "action": "Save",
    "entityId": "1364256301",
    "entityType": "Track",
    "nonce": "0x86738e65b8f6144436b7a769bf4f5a3ab747d8cc558ce299948fc5d78b12f531",
    "signature": "0x3804490bdbfc9d4f722976a2c99d347e8eeb6eb91cf14007c692cdc1bab275ae66be93efc415bc0dcd81956f420b9c29121bd38caf7c8a27c568444be06466001b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}