{
  "manageEntity": {
    "action": "Save",
    "entityId": "104893993",
    "entityType": "Track",
    "nonce": "0xc690f553c03bdfe8897118e01dfa8cac41126fed262a81f0cff2d68cb7b9f181",
    "signature": "0xcd7a1ff96fd7fbc092e03c6a7f54772e42223bec379a0cef0962c369556613735f4037ce46300d3914f63de7e78edfeb2c109b2175d218ecd92269a7b4247c821c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}