{
  "manageEntity": {
    "action": "Save",
    "entityId": "1858440134",
    "entityType": "Track",
    "nonce": "0xaaa94d96f82fcfd8dd7949b10bbdd26bb04bdff017efcc27217d11e8601310c4",
    "signature": "0x604dc9ac6617f66c89767ce3d134d05ea51cdfa75efde0d702c9e9328d19f3c249cf127ea72979ff1dcffd5aeb4aee6e79c2cf0d36e3324ca88051bc56459e421c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}