{
  "manageEntity": {
    "action": "Save",
    "entityId": "187092507",
    "entityType": "Track",
    "nonce": "0xe3fa13ebdcb1e185728d8086f06e3f254894cb6afe3c555fdf08b84154940959",
    "signature": "0xba393a09178adb28cb3c7e9677d38a937f370a4b3dad3b4102a6040c22fc913a2fe91e9e267381809ef0a109f985ca94c3e3d45306291b124fb2bcf007d21d7d1b",
    "signer": "0x7425EdbFdF528603A88c658f4cf8B1396a8a77F5",
    "userId": "406225571"
  }
}