{
  "manageEntity": {
    "action": "Save",
    "entityId": "240839229",
    "entityType": "Track",
    "nonce": "1786135102370655129",
    "signature": "0x19614126b36256198dd0a85899dad2a384211c678ba53aa79a6a1fc714a7291126ebaa03e3d96d98a169c0ed1e1c59ee74d123e929e3208634fb86c68ca4b2c81c",
    "signer": "0x6620103988B969bE5810F1B5530c1A44Fe6048A1",
    "userId": "568518925"
  }
}