{
  "manageEntity": {
    "action": "Save",
    "entityId": "1601797093",
    "entityType": "Track",
    "nonce": "0xaa72fb8afc85a78a2f7351d3cd359ea9b31515d6df0de10e6e26fe1a11c13001",
    "signature": "0xf9f547bccbe089d56cc6e0bbf2d79e29204a3fcf1075d4df31d93fe62fc684ac206a7688a03602da0997f28319f262677992ef23c035e2ed565bc019def45f641c",
    "signer": "0x7B3AFAc08245Ef9d1CFfF7f7cdDBCAADE68f94E3",
    "userId": "230426"
  }
}