{
  "manageEntity": {
    "action": "Save",
    "entityId": "975467615",
    "entityType": "Track",
    "nonce": "0xde3b2ea9913795f23733aa7353d90e945d0c7ec31f405a63dbdebe431389cbd2",
    "signature": "0x10b119d4aadc86308e5e35c1e2563e873480b2008bd7e4d98ecc52f5341dfedc1a2d9bd4a58b5a512f93f85cddeadd6e067a582c6b67ed691fb187d3eb7adaf41b",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}