{
  "manageEntity": {
    "action": "Save",
    "entityId": "1285696973",
    "entityType": "Track",
    "nonce": "0x84e6a3d74631efdcd63ca9bfea4dd6e0661b6908041f490618f46333b7c8cf10",
    "signature": "0x75c7200ffe79daa416b4907e8d75a3ac9864dfcc3c12d715d9417ebf0b6c9f8a5536e2ca1d2f81483bda50f7c88632d84af60065226e4e746508c6b035f152e51c",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}