{
  "manageEntity": {
    "action": "Save",
    "entityId": "327655",
    "entityType": "Track",
    "nonce": "0x53858f5b0a26b0afdd0267d291b2cf1273e43c9657668c399ea2a05d93b57ce0",
    "signature": "0xa45ae5d395e7b817c5f25abb68bfcd7766a3a5714c10a741b3a1695b554dc5b93fbe1c477c3151727137fdb9265622f47ee8f69a3d676b74f6fbf7845614e83a1b",
    "signer": "0xD967b68365738013c9197659aAb46EB73a488080",
    "userId": "488430169"
  }
}