{
  "manageEntity": {
    "action": "Save",
    "entityId": "1777145444",
    "entityType": "Track",
    "nonce": "1792312675382547063",
    "signature": "0x398484878376e85f2e5e9572493ba8e76346dc927d2525bcef42ed33fc8efa2d58dd5f9f62995d7fbd6f94255507e1893c2ceeaa54d5d14e351ac3566c17c7de1b",
    "signer": "0x9B241b1a6A99d662AE67D328e091Fc94faF23fdc",
    "userId": "881446128"
  }
}