{
  "manageEntity": {
    "action": "Save",
    "entityId": "1985806456",
    "entityType": "Track",
    "nonce": "1775543075097304996",
    "signature": "0x2ead6f9d5107a3703f2cc061c41c459b73c424553c3ca9c2e360d43b933c01035ff5d0fa5a32f57d8f79b701c77adc2d4742b1838d132ebe699ae303904639811b",
    "signer": "0x43e766989e99A80eCF18BF165011e01fbFC3A676",
    "userId": "106879"
  }
}