{
  "manageEntity": {
    "action": "Save",
    "entityId": "173104",
    "entityType": "Track",
    "nonce": "0xf46b82fecde9f73e1d7d4965158e87f619660e3145d9f7e5db3c9d430c5b884b",
    "signature": "0xac0b536bcd78804ad24da976afebbe2fb9dcb9366be3c531dd2cf8bcbfbbc2e876886fc309d040f4c6535610de744f6115609236d36e940d057d2d66f27fa3611c",
    "signer": "0x9c0E158fd6a79ba8384938c72F34b5D765d2A9Df",
    "userId": "178678516"
  }
}