{
  "manageEntity": {
    "action": "Save",
    "entityId": "2088245172",
    "entityType": "Track",
    "nonce": "0xfcfa488e21706ea1128c5dfcd8f6ec18a80c95a4fc4156be64186eb1b5d4f3bf",
    "signature": "0x4f1f5966435a11a407fd40b6cf2d3bdcc08726d1d00f7dfa81725afd1503ae95323dab31e8c87f5bfbf7da9d19f38e45e7eea2711d8a9a2c4c001c3e1425bba71b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}