{
  "manageEntity": {
    "action": "Save",
    "entityId": "1760815768",
    "entityType": "Track",
    "nonce": "0xab80fca4be9bb9afbc32cc18f071e3b87cdfe423ca6bc8deee344cbd7947af2a",
    "signature": "0xec853304841b7c536c91f4e73ab9660a435455434547852fb6ed610874fbae5d1294781ae5e8991df8b334eeb46e78ec0f08878f5f72922d5fe9f7569b6fe23e1b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}