{
  "manageEntity": {
    "action": "Save",
    "entityId": "61379558",
    "entityType": "Track",
    "nonce": "0x52535f84be45e271b82ce0d488a3f070559e8ed1f9aa7459ceb10bcf74f5221b",
    "signature": "0xd392b1a24c71502ad2eb73106dee449d88bf81f613dd33762a467857cc0f47061b06d8f99fa557450c5fc499d1260ea7eece827404a44cfbb0e3717446a85ec61c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}