{
  "manageEntity": {
    "action": "Save",
    "entityId": "1402717284",
    "entityType": "Track",
    "nonce": "0x5d1cadc0a0210ee36915e239e17380acfec4d32f5ea9b9aa2cab9b02e75afff2",
    "signature": "0x2852c4cd4961c504014b7fd44eb9134bc294388d5bff2616802ab929bd80537a34c344992941979541b84a1d33fd65b8c08650f6dc735d62b3e4987821f8791c1b",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}