{
  "manageEntity": {
    "action": "Save",
    "entityId": "219981726",
    "entityType": "Track",
    "nonce": "0xd98dd17dc1f4a6cdde8db9e4866fd5797598c3c1f0e652ec5a3c9ef40ffa39f9",
    "signature": "0x91c22d56075711d83bfbb0165f86eabeac5cb19ab0e12854fb2031e574eaf07c3ca7b19bca6c65726379de943ab333af4bf6af7b5de01d0068c2c2b092738c4e1c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}