{
  "manageEntity": {
    "action": "Save",
    "entityId": "28960891",
    "entityType": "Track",
    "nonce": "0x80e8a72ad3295aac83a16e386a76324c5cd01c753271985800b908207d6dfb48",
    "signature": "0x97d606bd5f5725204c08b32d170c28bec8aca29f7ba22798791b2c6cd77a9201408d10b539c57ae33a7e501be58bd63d366aafcf1be234d80cbc1debe60438761b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}