{
  "manageEntity": {
    "action": "Save",
    "entityId": "1049328",
    "entityType": "Track",
    "nonce": "0x1a1e2eeaa6765dc49a0f14c5a3139059614ca0ed27775281c5ab1a8f51d5e712",
    "signature": "0x210a0b7f1cf623c5b387dc8735b7741b5b1cf1e96f274bc66adff353aad51fba7bdf60b5af040af1ccf284166f5f93f39db6d7c40d5d3614d5ad9fa3b79119d21c",
    "signer": "0x7425EdbFdF528603A88c658f4cf8B1396a8a77F5",
    "userId": "406225571"
  }
}