{
  "manageEntity": {
    "action": "Save",
    "entityId": "871892975",
    "entityType": "Track",
    "nonce": "0x0e2aa11abc84a6afb8857104069267600c3d3848fcee53f19556623c87bc88c5",
    "signature": "0x2408152741db71724d661b3f57ee7ae7a333028c5644836c9081778ec628cb3919edc18ca0777b2a11f4f76b22e758970815dea0f8625ddaf90de25e4ea5e3d41b",
    "signer": "0xD9254B079e0e1571E56512C57188F2eec899054f",
    "userId": "854498636"
  }
}