{
  "manageEntity": {
    "action": "Save",
    "entityId": "1107390338",
    "entityType": "Track",
    "nonce": "0x559a28efa8c9e59a95fd6c5209244d1e3ae231effdcc8d09f2051bf95e9652fc",
    "signature": "0x4b73ff99ac4c252240bd1f96412f7629e8f3dc5bef098a960688bac88a4121d176e0341221c0582819fe8f1fe2cb9cc35489cc5f75b718bdb06cdedbc0f569b71b",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}