{
  "manageEntity": {
    "action": "Save",
    "entityId": "1967853165",
    "entityType": "Track",
    "nonce": "0xa4e1505239f0294d627fc89cf36ab043a5870f846ac33aca9a26f4603b41dd9a",
    "signature": "0x9fb715713cefd24f764f93588e5982415b09ba7aa532fd64bcf63b62c45de06844d4531c41be9c82ef50ca67ebaab324a5fadc1f34f106a09dd588e03ee2cd141c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}