{
  "manageEntity": {
    "action": "Save",
    "entityId": "44178",
    "entityType": "Track",
    "nonce": "0x077ffbd02d5d95ece60fd6084d7e3306548c07fd8cac6a9dc082c080518d3d27",
    "signature": "0x8edb2f4b8987eb82af62d2bf815f6c5bc45fa3eba4f8e82d825683b9ac180c413a7e969c4e0a42c7c3e42d0ade49af237f2e2abca5a6a4c85961e3ba485d40201b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}