{
  "manageEntity": {
    "action": "Save",
    "entityId": "87502",
    "entityType": "Track",
    "nonce": "0x027960b31b901f70242279f250a761e9a8f0d066d52fbe91b75b3f89150783c0",
    "signature": "0x50e8510c8fc2867b7623a580d2fe9742bd2f83060d95e1878b1db40f258485ab52eed6fc956af7bdbe444772943704dbc131e72b7a69c2fee98b33b35407d2071b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}