{
  "manageEntity": {
    "action": "Save",
    "entityId": "250017",
    "entityType": "Track",
    "nonce": "0x07249f907d2b39d07332c040ad1d90e7f06978486ba72de0375be285fbae6ed7",
    "signature": "0xd5da2d395311c8db8c9ac225e77fc030fb2e4fd7899fa6cb1fddcab5d6a686331afa6ead42c5ef8a36c0af50ce72b43eda73de2e4ecb932beafbdb2d5f992b661b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}