{
  "manageEntity": {
    "action": "Save",
    "entityId": "546429383",
    "entityType": "Track",
    "nonce": "0x94f793219ef34627d28fcacc8313c3933244006dace400713e49462fa675f814",
    "signature": "0xd9688f1a8059987a2a6e684b8240a23950d435bd56d692699c76a3043233b0d66a7efd400d6625c6317dfb62fc0361599859ce66483ad67ea3a7ef92b235133d1c",
    "signer": "0x796D60E9fE921C82Ef20f6329e27dD246392f542",
    "userId": "809803"
  }
}