{
  "manageEntity": {
    "action": "Save",
    "entityId": "2031712284",
    "entityType": "Track",
    "nonce": "0x6ee44b69431e619c9f0a28523beff7eb9d0c8667407717741c86378bbe2390d6",
    "signature": "0xd011d359f30230a0c2122a1eaef8b4d341f21802b5a843fbb026248226b5f2ff5f1557ae24d0ba382c40005853b49b1f102604deec6e304ccbc924fd344842301c",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}