{
  "manageEntity": {
    "action": "Save",
    "entityId": "1043503832",
    "entityType": "Track",
    "nonce": "0xd9be9e9785a2ca17f04ef20a4dc799be2a5852a570346ac65fe140c6433e898c",
    "signature": "0x617229de5a60fa73cc9017829ac95fb8248837d038e6237b397e64b6213eac3428daac1f3aee1410c41a0e0c3e4ae0867944df606d033d08bbd2856f96762d4e1b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}