{
  "manageEntity": {
    "action": "Save",
    "entityId": "410201689",
    "entityType": "Track",
    "nonce": "0x5c4b38f2863868cc637f3b243d29f67e38f63a2a3b933334bb43d5f467e11588",
    "signature": "0xd8d42bb002015f8e8f6b2f8f7420c3cfcb5530bd769fa6916d773903854502e02227fd1b391ccf3dce9b9b864fa0ba5342c0344920550598dfd09574c372d1841c",
    "signer": "0xD967b68365738013c9197659aAb46EB73a488080",
    "userId": "488430169"
  }
}