{
  "manageEntity": {
    "action": "Save",
    "entityId": "1931374379",
    "entityType": "Track",
    "nonce": "0x3179e5486cb3929e2362d93c50bf6b76beffbd1624436938901c6794f9e85282",
    "signature": "0x8f8af657ff0ff0c212973c5ac78964cf6a13629e346b31ec1da9e77e6df82e797f87f9f0f370928b8aafab8d0de8e37dc3ccd14fddc3fa8363f8a0b59bfc898d1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}