{
  "manageEntity": {
    "action": "Save",
    "entityId": "1973357746",
    "entityType": "Track",
    "nonce": "0xb875e373553612f20c2b05ee37be54a7d69a48582e86119b255b01e655a5db26",
    "signature": "0x5ef698e396b9a10ebb785fda7465cd1a269eab9f6139a0d6fc0358f7ca71a77e30fbec2767ef9f8da6e409b6c927dd61384120e07525410d46671a1ff266a4c31b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}