{
  "manageEntity": {
    "action": "Save",
    "entityId": "230212348",
    "entityType": "Track",
    "nonce": "0xafba68aa344e5b422a87145fec07ace1257453dcb3654db4333358726f4476ce",
    "signature": "0x6c3af680f0656751bcb9241c758ced36cf2213d430e2f66928c37d89fda63d38798544d707684ac3a3943751c517733938096613ad98ff31ef59045ac41829c61b",
    "signer": "0x1d868e2cc29848871636BdCF83a08A975835b6DD",
    "userId": "120328011"
  }
}