{
  "manageEntity": {
    "action": "Save",
    "entityId": "402063673",
    "entityType": "Track",
    "nonce": "0x36ae391dfaca73e3297becf4c93885978b0741b23710bf0da3278a8003e40019",
    "signature": "0x355fe1aed869bc925d2d72ae3857325c55a264feb83ef8b5797cd51dee12b2fc0fe5828220c0df04e3ba1bd68123539a6d0506b7e1a07f6387c67b82cf23a3e21c",
    "signer": "0x7eBAab495a64FAea1f04dc59ff804bf939da7B12",
    "userId": "709077025"
  }
}