{
  "manageEntity": {
    "action": "Save",
    "entityId": "912222062",
    "entityType": "Track",
    "nonce": "0x1e16f92e001247790d664e359c5210100a2eacb8fb014c9aea544dad32a9be2b",
    "signature": "0x7b93d654f152a6184a4d39698e24f480777b2ae4132eb3288d6b9644cc37212e6e8a433e50f69b3e4f29b9a0579eef64c57fae14f53d3d36c0acd8add0a0fe711c",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}