{
  "manageEntity": {
    "action": "Save",
    "entityId": "1447979955",
    "entityType": "Track",
    "nonce": "0x1c0912d6fc1e44fab7d00d5387fdbe6983fe675cfbad6657bd8f1793dd8effe9",
    "signature": "0x2698a6987ce57aa209e860e0952af5f7b1351aa4bf66e07d052416866cba52d3338b67882f44087d064edcbf705ce48edb49e5c1fe046f580bd5e20a3872cb681c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}