{
  "manageEntity": {
    "action": "Save",
    "entityId": "846212961",
    "entityType": "Track",
    "nonce": "0x8995841f985fc2cd47f0c16820096904d62e30940d776699d0881178d92bb060",
    "signature": "0x42b93ea2f4d25b3d5d3cb49f1a3183fd436da1372ebd0fed9a2e111f364babb700067fe9ccf9cb07a0767d7d4e030e6c76e415a139e944e588288ac53a13259b1b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}