{
  "manageEntity": {
    "action": "Save",
    "entityId": "60348817",
    "entityType": "Track",
    "nonce": "0x5c1daf1b2a1d1b00c9bd65da11aa3b18332069906a0144e31a1da3bccf157e9a",
    "signature": "0x85278a3d1d8aa83755d8c2e0c51f25e2f2f9bf77f881c47a6aae3249f4ae4d746e5f83b1fec1539d1edef810f1f8e432e31c3c84a5a63ca95ef24a1a361bb38b1c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}