{
  "manageEntity": {
    "action": "Save",
    "entityId": "146182906",
    "entityType": "Track",
    "nonce": "0xebc2df78b6d0fb9fcf1627a6350a35db7d9c23e639bb02902ce8fae9b830cd65",
    "signature": "0x29f96df400b3320a1895d2c5a5f255a3d747dd7cc97a0f52d107fb4730cf0c860a7e6c32e3ee5d2699e163e50be5f7b495faae052a66cf1ac637b727bd1325761b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}