{
  "manageEntity": {
    "action": "Save",
    "entityId": "285943",
    "entityType": "Track",
    "nonce": "0x749a2c57afcf62ff1fdda67de0102ff17573ae16eb9418d50630f7004d301a8a",
    "signature": "0xc2457469c02af3f5e4a8a3896eb69e9cfdcc747a7367b9d64a0622f370eec05e08eaed3af9262c89768b3c22d0a94d086b6d52c49149b44faf2f45638a1af2211b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}