{
  "manageEntity": {
    "action": "Save",
    "entityId": "72526632",
    "entityType": "Track",
    "nonce": "0x32b83d1f3e338ba010906243c724f1902ba60568c34409bb4bfde1a53a0e79c1",
    "signature": "0xa5acd3ad47d99c06117184a07c41795e4e03864baf8b7422c112f046d26ca1145e45456a965e87c05c19f727c5d8e98622e63961adb62a2d6f823c5e74a0f54e1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}