{
  "manageEntity": {
    "action": "Save",
    "entityId": "591156155",
    "entityType": "Track",
    "nonce": "0xdca798731e945f2e094ad1ec97c999bfb41a865fc9f2e4d9e063a0d0fa8b9a06",
    "signature": "0x013447a824cb82cbfd36b9c91d9dd8e34ba5b6f3d09d2a572182a5436f24b1e4049e20927d5a2307bdc535ba299cee6440d030b0f0021c1d2563b13cde40ee801b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}