{
  "manageEntity": {
    "action": "Save",
    "entityId": "984509372",
    "entityType": "Track",
    "nonce": "0x7fd3a4ad02e48e4759c23e84f1929d06e79bcfec924a560d718bc05f42635bef",
    "signature": "0x56ca60d08d3f78a9ef294bd6cc9cca9b5301037cae9c60d087c72fe95ddd2f2d05f8a6d56a8afb02c70724dda6a3377ed3181b0d099603032e8b0d72ab81031d1b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}