{
  "manageEntity": {
    "action": "Save",
    "entityId": "1047922414",
    "entityType": "Track",
    "nonce": "0xf9b024d6563ce28cf897916d1b76958a25462631351021fe85a5ba6679c6730a",
    "signature": "0xc5c61f5d44a8250634e4e6d11531d0d811546e6c6ef2f9f4cd3671cbc3f038623756e82f0a3190a29b698e046508f2cd0ff1e2fe8e02df60e62a357c1de2bf7d1c",
    "signer": "0xD967b68365738013c9197659aAb46EB73a488080",
    "userId": "488430169"
  }
}