{
  "manageEntity": {
    "action": "Save",
    "entityId": "1124209",
    "entityType": "Track",
    "nonce": "0xeb34ec0efe5531608113c14175015eae4b989273b5a55fc126009c9bc5cdad61",
    "signature": "0x0efd51ea85bf53a04539f38bb1e2eccb6ff767a1f7ff29d6dd7ad99c980724c4523810d2657245884d75b0f4753f1825a14968e994dc46f1bcd2aa499b3666d01b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}