{
  "manageEntity": {
    "action": "Save",
    "entityId": "241550032",
    "entityType": "Track",
    "nonce": "0xc11a6e042b8e85a1b918f79448f6b240aa1975b160be21d97fb8bb1157a12f10",
    "signature": "0xfc77a54f1fcee393432af0f2fc347ab1ec7aaf3fe61189c2f555ca5999f6a3686b58b627fcf939e3ed6f771c05d81c8eb9155401274f5358c9a0d5dab9e941e61b",
    "signer": "0x65b2681094e762CAD2349e6C1e2FbC8d54b9c046",
    "userId": "11153747"
  }
}