{
  "manageEntity": {
    "action": "Save",
    "entityId": "1879440489",
    "entityType": "Track",
    "nonce": "0x1ba68904fa15d71b5ebc2e43b591fff1b48a636914690d2163230e850d74bcc5",
    "signature": "0x817145255e32d58e59925c2f2bdc554c17b5da417902806291330ab5c57f37990ab1b1eecebe79d7ff56b1ff9ba2e252cbcc8e0698fcf95ed0b896d46b6bb14c1b",
    "signer": "0x7C2169544c0568cB3b210f320356B6A77E891F30",
    "userId": "495616082"
  }
}