{
  "manageEntity": {
    "action": "Save",
    "entityId": "1271300494",
    "entityType": "Track",
    "nonce": "0x85522c5d95620948062b68790c64ce29c93214e5af5a0dc082c5c9495f9a7ad2",
    "signature": "0x03a9a4d3a19f5abaf219b76403f5434115e582d9e359f56176aae8d9a95d13fa3412ef761a9eb2d16c26133c7d1d056780197e052341f49c869aa37fa2d7de111c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}