{
  "manageEntity": {
    "action": "Save",
    "entityId": "1266519154",
    "entityType": "Track",
    "nonce": "0x01fed51fa17e3b9e037a65404e6e1888cf96f66c4e8123b916ee4564fd11a5f8",
    "signature": "0x041598c049fd46bcfe67361ef3f449872ea748ea04c91686212ad24fb474b52a68c5c20b0cdf1d13feb57f7e03c7892f11d9063f5508481ac500249877a437eb1c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}