{
  "manageEntity": {
    "action": "Save",
    "entityId": "731485",
    "entityType": "Track",
    "nonce": "0x76a286fef01016efd5aed6d636bd3add218184c755379e560155bf4db8f20dc1",
    "signature": "0x9f60d185799bb58e0a564b926392483d4a4dd6d871553df995946ba7a394761c5f401c2360ded82c9925a95a9ade7a61f6f9657ecf6c62212a67bb09259b8adb1b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}