{
  "manageEntity": {
    "action": "Save",
    "entityId": "1510672581",
    "entityType": "Track",
    "nonce": "0x6a980461ab52d865ea767bbf3d1896ac2b90641a3f8e65375af38aab397d5b69",
    "signature": "0x328f16d0c6155d9619b371c784810632725a2cdae655f74795237c8e71958a7a37f8b15fca48958007e956d8c4a6a5ea5a947452b5efbe5585a1b2e4c943a2811c",
    "signer": "0x5c51216FbbB9B7A562f11267f91f72A7be1e8DE3",
    "userId": "301637"
  }
}