{
  "manageEntity": {
    "action": "Save",
    "entityId": "1851262914",
    "entityType": "Track",
    "nonce": "0x5e9219eb9cbe05911cba8e23e1fbabc41dd5084f32391937e5982d306e2137a9",
    "signature": "0xdbf354c4454f2444ddce4d6d92c185561bde1e00311ca461dc63aef07e080c9712539941a591b04af5c83dd8c1086223b5d610017ef4e38667e7e2564766fdb91c",
    "signer": "0x46ECf83B77C4b8bEa00d024616B7522C53096eb0",
    "userId": "654574340"
  }
}