{
  "manageEntity": {
    "action": "Save",
    "entityId": "1277159660",
    "entityType": "Track",
    "nonce": "0xf1a752149225ee83dac04d91f4b036e4fa1d46a0693ea585e522f4b06117589d",
    "signature": "0x11f846307f031fcb45ce6c3227264c729a0c1b942e9938e3af61968cd92fc6a731cfa1342c392162fe57da51a109f990adfd0fa88906ba8fba5c47da570598b41b",
    "signer": "0xDfAC0702040EaBd2d42e773014D4b014C0747D9c",
    "userId": "707937"
  }
}