{
  "manageEntity": {
    "action": "Save",
    "entityId": "1699366845",
    "entityType": "Track",
    "nonce": "0x0667634c5e74378ec19986cb8b3b2e17c8a1c5121bafb2fd6030e2da320443d3",
    "signature": "0xb55577c161d05091e2a46a4c32a297c67ff889edc162518de1bc17380fef7d8d71e33fb9f62dad22ad6fbd0633084b43c67647ec922da3782f1dc1d83bd76fd81b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}