{
  "manageEntity": {
    "action": "Save",
    "entityId": "117141502",
    "entityType": "Track",
    "nonce": "0x951c5b4d4585c11bb7ac9af84f994c92f9980854bd3b5b31f88a991f9508755b",
    "signature": "0x136e6be4810ac79d2837a3eaf774a85fb1fbb42f981d5481e2e4d66f964716e13f29b12e1b9ff6f50e95ae9eb4ad3574564af42b2f046d93ca7dfad235d859bb1c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}