{
  "manageEntity": {
    "action": "Save",
    "entityId": "432462",
    "entityType": "Track",
    "nonce": "0x77f7ad91be603f3808f46d72cb5d6ec77e9d53c16666db7fd5708b0f12942934",
    "signature": "0x5eccf827f8e399208cadd3a0e59a5a5880fc16852643717fc8b1b0ec9555625d7ced5a996cb251d7000aa82141da6965835a01abaed5331030f267aad6d79b9f1b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}